Electric switch.



i.. FORD.

ELECTRMJ SWITCH.

APPLICATION man FEB. 13. ma.

l 1 74,974. Patented Mar. 14, 1916.

2 SHEETSSHEET l.

L. H. FORD.

ELECTRIC SWITCH.

APPucmox min FEB. i3. |915.

Patented Mar. 14, 1MB.

2 SHEETSMSHEET 2,

Levi/ERM@ LEVI H. FORD, OF ABILENE, KANSAS.

ELECTRIC specification of Letters Patent.

SXVITCH.

.Patented Mar. 14, 1916.

I Implication filed February 13, 1915. Serial No. 7,981.

To all 'whom t may concern:

Be it known that l, LEVI H. Fehn, a citizen of the United States, residing at Abilene, in the county of Dickinson and State of Kansas, have invented new and useful Improvements in Electric Switches, of which the following is a specification.

The present invention relates to meansv for operating electric switches, and particularly those 'of the type having a swinging knife contactmember. f

One of the primary objects of the invention is to provide means whereby the switch can be actuated from different points, and in this respect it is particularly useful in a shop where a series of operations are .carried on, in saving the time of the operatives.

Another and important object is to provide operating means that will insure the proper contacting of all the elements simultaneously.

The preferred embodiment of the invention is illustrated in the accompanying drawings, wherein I Figure 1 is a view diagrammatic in its character and illustrating the switch and an arrangement of the operating means therefor. Fig. 2 is an enlarged view lof the 'switch mechanism and its actuating means. l? ig. 3 is a front elevation of the saine. Fig. 4 is a detail perspective view of the actuat ing yoke. Fig. 5 is a detail perspective view A of one of the posts for said yoke;

Similar reference numerals designate corresponding parts in all the figures of the drawings.

An electric switch of any well known type may be employed, and in the embodiment disclosed, such a switch is illustrated as having a base 6, spring contact elements 7, ,and

a swinging knife contact member vcompris-v ing blades S'that are movable into andout -of engagement withlthe elements 7, and are each pivotally .mounted on the base at 'one end,` as illustrated at'9. The opposite endsV of the blades '8 are connected by across han 10' of insulating material. Instead of the. usual handle, this'cross bar has secured to it, a metal bar 11 terminating in reduced'.A pintles 12.

Located on opposite sides of the switch, and preferably secured to the same wall or other ,support as that on which the base (l is `riiounted,are posts 13 having feet 14,'by nieansof which they are secured in plane.,r

An `actuating yyoke 4l5 is f l with spaced'substantially parallel arms 16 pivoted as shown at 17 to the posts, and thesel ar'xns have in their free ends longitudinal slots 18 in which the pintles 12 of the cross bar 11 are slidably engaged.: The yoke, furv the switch will be thrown to open position,

and if moved in the opposite direction, it

'will be thrown to closed position.A Moreover, because of the spaced connections .between the yoke and the knife member and the spaced mountings for said yoke, there can be no twisting .action duiing the movement of the knife member, and all the blades thereof will be brought simultaneously and firmly into coaction with the contact elements 7. This structure, furthermore, may be employed in connection with electrical apparatus which it is desired to place in op- A eration and to stop at .dilferent'points Ordinarily, a switch is employed at some pointmore or less contiguous to the machine to be controlledthereby, and every time such machine is to be thrown into operation the operative must go to the switch and close it. In like manner, when the machine is to be stopped, another trip lis necessary to the switch. With thel present operating device, means may be employed for actuating the switch from different points, and attention is called to F 1 showing, diagrammatically, spaced forges A with an lelectrically operated trip hammer B between them. As is well known, an operator may be employed at each forge and the .trip hammer is used commonly and alternately by them. There is illustrated a cord, cable or other liexible member A21, which is connected to the eye 20, and passes around a pulley 22 located beneath the switch, thence two cords, as 23, run to and over other pulleys 24. suspended from the ceiling.

orother suitable support', and these cordsare brought to a point adjacent to the two forges, respectively, `where they arel provided with suitable hand grips 25 that also constitute? ooiinterweights for maintaining the cords relatively taut. .Another cordor iio grip and eounterweight 28 is p leaving the latter. In this operation, ther .and thatvothersv of an analogous c hara L be apparent to those skilledin the cable 26;, likewise secured' to the eye 20,

passes directly over a pulley 27 above the switch and toa pointadjaeent to the trip hammer B where another combined handle rovided. With this arrangement, it will be evident thata workman 'ateither forge can start the vhammer whenever his iron is proper condition to work on-it, and by the time he steps from the forge to the hammer, the latter is in operation. When he has completed his Work, hecan throw the switch out and thus stop the 'hammer Without fore, he eliminates t'wo trips to the sW block, oneof which would have been with his worklin h s'hands.A It will b dent that theabove is merely an exa of an arrangement that can'be emplo" can be providedwith the structure disclo From the foregoing, it is thought that construction, operation and many adv tages of the herein described invention Without furthefdescription, `and it Willvv understood that various changes in the size, shapez proportion andrmiuor details of constructlon may be resorted t0 without departing from the spirit or sacrificing any of of a transverse-bar`secured to said member and having termi-nal pintles,"posts located pivoted to the posts and ,hiehfthe pinties are enting arm carried by the I have hereunto set ice.. 'of two subscribing LEVI H. FORD.

SAA- of the switch, a yoke havj 

